Exhaust manifold



FIG. 1 is a top perspective view of an exhaust manifold according to the invention;

FIG. 2 is a bottom perspective view of the invention in FIG. 1;

FIG. 3 is a left side elevation of the invention in FIG. 1;

FIG. 4 is a right side elevation of the invention in FIG. 1;

FIG. 5 is a top plan view of the invention in FIG. 1;

FIG. 6 is a bottom plan view of the invention in FIG. 1;

FIG. 7 is a front view of the invention in FIG. 1; and,

FIG. 8 is a rear view of the invention in FIG. 1. 

CLAIM The ornamental design for an exhaust manifold, as shown and described. 